JPH07291323A - Lid-opening/closing device - Google Patents

Abstract

PURPOSE:To stabilize the opening/closing of a lid, and improve the controllability by a method wherein a first hinge part is pivotally supported on a surface of a lid on a box body side, which is rotatably attached on the box body part of an electronic book, etc., and also, a second hinge part is pivotally supported in the box body, and the other end of the second hinge part is pivotally fixed to the other end of the first hinge part. CONSTITUTION:A hinge fulcrum metal fitting 17 is provided on the lower surface of a keyboard unit 15 of an electronic apparatus, and also, a hinge fulcrum metal fitting 22 is provided on the bottom of a lower case 13 respectively. Then, one end of a hinge fitting 18 is pivotally fixed 19 on the fitting 17, and one end of a hinge fitting 20 is installed 23 on the fitting 22. Then, the other ends of these hinge fittings 18, 20 are pivotally fixed by a pin 21 to each other. Then, by a spring member 24 wherein one end is attached to the lower surface of the unit 15, and the other end being bent into an approx. hook shape is attached to the hinge fulcrum metal fitting 18, a lid is energized downward under a condition wherein the keyboard unit 15 is closed. Also, under a condition wherein the keyboard unit 15 is opened, the spring member 24 separates from the pin 21 to keep the keyboard unit 15 under the open condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid opening / closing device used for devices such as electronic books and electronic notebooks.

[0002]

2. Description of the Related Art A conventional lid opening / closing device will be described below with reference to the drawings.

FIG. 10 is a cross-sectional view of a conventional lid opening / closing device. Here, 1 is a lower case, 2 is a keyboard unit, which can be opened and closed by a pin 4 provided on a rear shaft portion 3. A caddy tray 5 is provided below the keyboard unit 2, and a disc 6 is inserted therein in the direction of arrow 7. Further, the LCD unit 8 is provided coaxially with the pin 4 of the shaft portion 3 via a pin 4a made of an elastic member, and the LCD unit 8 can be opened and closed, and the elastic force of the pin 4a opens and closes the LCD unit 8. It has a holding force that will not drop due to its own weight even if stopped halfway. 9 is a toggle spring. A hinge fitting 10 is provided on the keyboard unit 2, one end of a toggle spring 9 is inserted into a hole 11 provided at the tip of the hinge fitting 10, and the other end is inserted into a hole 12 provided in the lower case 1. Has been done.

FIG. 11 shows a state in which the keyboard unit 2 is completely opened. When the LCD unit 8 is opened, the rear end of the LCD unit 8 stops at a position where it comes into contact with the lower case 1. Next, the keyboard unit 2 is a toggle spring 9
By the spring force of, the LCD unit 8 is opened to the same angle and held in that state.

FIG. 12 is a sectional view showing a state in which the keyboard unit 2 is closed. When the keyboard unit 2 is closed, one end on the side opposite to the side where the keyboard unit 2 is rotatably fixed by the shaft portion 3 is locked to the lower case 1 by a locking member not shown, and the toggle spring 9 causes the keyboard unit 2 to move. Is urged in a direction away from the lower case 1. When the locking member of the keyboard unit 2 is released,
Due to the urging force of the toggle spring 9, the open state shown in FIG. 10 is obtained.

[0006]

However, when the lid is opened and closed by the toggle spring as described above, the toggle spring is often installed near the fulcrum of the lid, so that the stability in the state where the lid is widest opened is large. However, there is a problem that the maximum load point of the toggle spring has to be overcome to open the lid, and the load for opening the lid is large and it is difficult to open. Further, since the lid is often opened in front, the strength of the keyboard unit is required. Another problem with the external appearance is that the position of the toggle spring is near the fulcrum of the lid, so the force to tighten the lid is concentrated around the fulcrum, so it does not spread to the front of the lid, and the strength of the keyboard unit becomes insufficient. However, when there is a warp or the like, there is a problem that distortion is generated to form a gap on the front surface, and it is necessary to control the strength of the keyboard unit and molding and assembly.

[0007]

In order to solve the above-mentioned problems, the present invention is provided so as to cover at least one surface of a housing portion and an open surface of the housing portion. A lid portion rotatably attached to the casing portion, a first hinge portion having one end rotatably attached to a surface of the lid portion on the casing portion side, and an inside of the casing portion. A second hinge portion rotatably attached to one end and the other end rotatably attached to the other end of the first hinge portion.

In addition to the above structure, an elastic member for urging a joint portion between the first hinge portion and the second hinge portion when the casing portion is covered with the lid portion, A stopper for fixing the rotation of the joint between the first hinge part and the second hinge part at a fixed position, and the first hinge part and the second hinge part are the lid part. Is provided at a position as far as possible from the position rotatably attached to the casing.

[0009]

With the above configuration, the elastic member does not work upward when the lid is closed, so the lid does not open. Also, if the hinge is installed near the front, the lid will be the most Greater stability in the open position.

Further, the action of the elastic member can reduce the impact when the lid is opened.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lid opening / closing device according to the present invention will be described below with reference to the drawings. FIG. 1 is an external view showing an embodiment of a lid opening / closing device according to the present invention. 13 is a lower case, 14 is an LCD unit, 15 is a keyboard unit, and 16 is a lid opening / closing knob. FIG. 2 is a front view of the same and partially shows an internal structure. FIG. 3 is a side view of the same and partially shows the internal structure.

FIG. 3 shows a case where the keyboard unit 15 is closed, and a hinge fulcrum metal fitting 17 is provided on the lower surface of the keyboard unit 15. Further, inside the lower case 13, a hinge fulcrum metal fitting 22 is provided at a position substantially opposite to the hinge fulcrum metal fitting 17. One end of the hinge metal fitting 18 is rotatably attached to the hinge fulcrum metal fitting 17 via a pin 19, and one end of the hinge metal fitting 20 is rotatably attached to the hinge fulcrum metal fitting 22 via a pin 23. The other end of the hinge fitting 18 and the hinge fitting 2
The other end of 0 is attached by a pin 21 so as to be rotatable relative to each other. Further, stoppers (not shown) are attached to the hinge fittings 18 and 20 so that the angle formed by the three points of the pins 19, 21 and 23 is always less than 180 degrees.

Reference numeral 24 is a spring member, one end of which is attached to the lower surface of the keyboard unit 15. The other end has its tip bent into a substantially key shape and is attached to the hinge fulcrum fitting 18. As shown in FIG. 3, when the keyboard unit 15 is closed, the spring member 24 abuts the pin 21 and urges it downward. Further, as shown in FIG. 4, when the keyboard unit 15 is opened, the spring member 24
Is separated from the pin 21. In this way, the spring member 24 has a function of cushioning the impact when the keyboard unit 15 is closed.

FIG. 5 is a detailed view of a state in which the spring member 24 urges the pin 21 downward with the keyboard unit 15 closed. The direction of the force that the spring member 24 urges the pin 21 can be divided into X, X1 and X2 vectors, but since the pin 23 is fixed, the force of the spring member 24 actually connects the pin 21 and the pin 23. It only takes the direction X1, which is the direction. Since the X1 direction is the same as the rotation radius direction of the hinge metal fitting 20, no rotational moment acts on the hinge metal fitting 20, and the spring member 24 causes the keyboard unit 1 to move.
Do not push 5 up. In addition, the pin 21
And the direction that connects the pin 23 with
Since the rotational moment applied to the hinge fitting 20 is small and the keyboard unit 15 itself has its own weight, the spring member 24
It is easy to design so as not to push up the keyboard unit 15.

In FIGS. 2 and 3, reference numeral 25 is a hop-up spring, which biases the keyboard unit 15 upward when the keyboard unit 15 is closed. Two
7 is inside the lower case 13 and is a keyboard unit 1.
5 is a claw that locks the keyboard unit 15 by engaging a claw 28 provided on the lower surface of the keyboard unit 5. Claw 27
Is integrated with the lid opening / closing knob 16, and when the lid opening / closing knob 16 is slid, it slides accordingly. Further, the claw portion 27 is inside the lower case 13, and is constantly urged by a spring (not shown) in a direction toward the claw portion 28.

Next, as shown in FIGS. 6 and 7, when the lid opening / closing knob 16 is slid in the direction of arrow 26, the claw portion 27 is formed.
Also, by sliding in the direction of arrow 26, it is released from the claw portion 27, and the keyboard unit 15 is pushed upward by the hop-up spring 25. Even in this case, since the opening amount of the keyboard unit 15 is small,
As described with reference to FIG. 5, the keyboard unit 15 cannot be opened by the spring member 24. However, it is easy to set the opening amount of the keyboard unit 15 by changing the design of the hop-up spring 25.

After that, the keyboard unit 15 is manually operated.
As described with reference to FIG. 5, since the force of the spring member 24 for urging the pin 21, that is, the force in the X direction is increased, the rotational moment about the pin 23 is also increased. As shown in FIGS. 8 and 9, the keyboard unit 15 is opened to the maximum opening angle of the hinge fittings 18 and 20 by the force of the spring member 24.

[0018]

As described above, according to the present invention, when the lid is closed, the spring force of the spring member does not work in the upward direction so that the lid does not open, and if the hinge is made of sheet metal or the like, space saving can be achieved. Since it is possible to easily install the hinge part near the front, the maximum open position of the lid is stable,
Moreover, since the operating position is close to the front, the strength of the keyboard is not so much necessary and the lid is less likely to be unnecessarily distorted for the same reason, so that the appearance is unlikely to occur.
It is easy to assemble and inexpensive.

Further, when the lid opening / closing knob is released by a spring member provided near the lid opening / closing knob on the front surface, the lid is automatically opened by a certain amount, and if a weaker force is applied, the lid is easily opened to the maximum position. It is intended to provide a lid opening / closing mechanism that is also excellent in performance.

[Brief description of drawings]

FIG. 1 is an external view of an electronic device using a lid opening / closing device according to an embodiment of the present invention.

FIG. 2 is a front view of the lid opening / closing device.

FIG. 3 is a sectional view of the lid opening / closing device.

FIG. 4 is a detailed view of the lid opening / closing device.

FIG. 5 is a detailed view of the lid opening / closing device.

FIG. 6 is a front view of the lid opening / closing device.

FIG. 7 is a sectional view of the lid opening / closing device.

FIG. 8 is a front view of the lid opening / closing device.

FIG. 9 is a sectional view of the lid opening / closing device.

FIG. 10 is a sectional view of a conventional lid opening / closing device.

FIG. 11 is a sectional view of the lid opening / closing device.

FIG. 12 is a sectional view of the lid opening / closing device.

[Explanation of symbols]

 13 Lower case 14 LCD unit 15 Keyboard unit 16 Lid opening / closing knob 17 Hinge fulcrum fitting 18 Hinge fitting 19 pin 20 Hinge fitting 21 pin 22 Hinge fulcrum fitting 23 pin 24 Spring member

Claims (6)

[Claims] 1. A housing part having at least one open surface, a lid part provided to cover the open surface of the housing part and rotatably attached to the housing part, A first hinge portion, one end of which is rotatably attached to a surface of the lid portion on the housing portion side, and one end of which is rotatably attached inside the housing portion and the other end is the first hinge. A lid opening / closing device, comprising: a second hinge portion rotatably attached to the other end of the lid portion. 2. An elastic member for urging a joint portion between the first hinge portion and the second hinge portion when the casing portion is covered with the lid portion. The lid opening / closing device according to item 1. 3. The lid opening / closing device according to claim 1, further comprising a stopper for fixing rotation of a joint portion between the first hinge portion and the second hinge portion at a fixed position. . 4. The first hinge part and the second hinge part are provided at positions as far as possible from a position at which the lid part is rotatably attached to the housing part. The lid opening / closing device according to claim 1. 5. A housing part having at least one open surface, a lid part provided to cover the open surface of the housing part and rotatably attached to the housing part, A first hinge mounting portion provided on the surface of the lid portion on the housing portion side, a second hinge mounting portion provided inside the housing portion, and one end of the first hinge mounting portion. A first hinge part rotatably attached, and one end rotatably attached to the second hinge attachment part and the other end pivoted to the other end of the first hinge part via a joint part. A second hinge part that is freely attached; and an elastic member that biases the joint part between the first hinge part and the second hinge part when the housing part is covered with the lid part. A lid opening / closing device characterized by being provided. 6. The lid opening / closing device according to claim 5, further comprising a stopper for fixing rotation of a joint portion between the first hinge portion and the second hinge portion at a fixed position. .